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Finding the Third Proportional to 31,489 and 48,749

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Solution

The third proportional to 31,489 and 48,749 is: 75,469.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,489 : 48,749 = 48,749 : x
  2. Step 2: Convert to fraction form
    31,489/48,749 = 48,749/x
  3. Step 3: Cross multiply
    31,489x = 48,749 × 48,749
  4. Step 4: Simplify right side
    31,489x = 2,376,465,001
  5. Step 5: Solve for x
    x = 2,376,465,001/31,489
  6. Step 6: Final answer
    x = 75,469.69

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.